13678397 has 4 divisors (see below), whose sum is σ = 13717500. Its totient is φ = 13639296.

The previous prime is 13678373. The next prime is 13678403. The reversal of 13678397 is 79387631.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6220036 + 7458361 = 2494^2 + 2731^2 .

It is a cyclic number.

It is not a de Polignac number, because 13678397 - 2⁶ = 13678333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13678097) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19022 + ... + 19727.

It is an arithmetic number, because the mean of its divisors is an integer number (3429375).

Almost surely, 2^13678397 is an apocalyptic number.

It is an amenable number.

13678397 is a deficient number, since it is larger than the sum of its proper divisors (39103).

13678397 is an equidigital number, since it uses as much as digits as its factorization.

13678397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39102.

The product of its digits is 190512, while the sum is 44.

The square root of 13678397 is about 3698.4316946511. The cubic root of 13678397 is about 239.1544143154.

The spelling of 13678397 in words is "thirteen million, six hundred seventy-eight thousand, three hundred ninety-seven".